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More precise data for informed decisions in wastewater monitoring

  • March 19, 2026
  • 4-minute read

In practice, wastewater networks and discharge points rarely behave according to idealized hydraulic models. Fluctuating flow profiles, sediment deposits, partial filling, or even bidirectional flows pose significant challenges for operators in reliably measuring flow rates.

Precise measurement data is essential, especially in such complex environments. It forms the basis for hydraulic modeling, system analyses, and the targeted optimization of network operation. At the same time, the measuring points are often difficult to access, offer limited installation space, and are characterized by highly variable flow conditions.

Reliable flow measurement under demanding conditions

With the Q-Eye PSC GWF offers a solution specifically designed for these challenges. The Pulse-Coherent Cross-Correlation (PSC) ultrasound technology used enables highly precise measurement of the entire velocity profile within the flow.

Instead of relying on individual measuring points, the system analyzes up to 32 measuring cells simultaneously and records the movement of particles in the water. This allows the flow rate to be reliably determined even with uneven or rapidly changing velocity profiles.

This technology provides reliable measurement data in both open channels and partially filled pipelines – even under difficult conditions such as polluted wastewater, very low flow velocities from 0.01 m/s or low water levels from 0.02 m.

Efficient integration and minimal installation effort

In addition to its high measurement accuracy, the system impresses with its compact design and easy integration into existing infrastructures. The flat sensor can be installed with minimal construction work, thus reducing operational interruptions.

Integrated level measurement and browser-based configuration enable quick commissioning and simplify everyday operation. Various installation options also provide flexibility for different application scenarios.

From measurement to informed decision

A reliable data foundation is key to efficient and resilient grid operation. GWF supports operators throughout the entire process – from selecting the appropriate measurement technology, through installation and commissioning, to using the collected data for informed operational decisions.

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Post by

Sergio Thaddey
Head of Product Management Water
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